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"As it does so, some places could also see significant ice build up overnight into Friday. This is likely to be accompanied by strengthening easterly winds.

"Long delays and cancellations to public transport could occur, whilst some roads may become blocked by deep snow, stranding vehicles and passengers. Long interruptions to power supplies and other utilities could occur."

Accuweather says flurries could start from 8am, with heaviest snow expected at 2pm - and warns temperatures will feel as low as -13C.

Met Office Weather forecast on Wednesday, February 28: Snow for some today, with heavy snow on Thursday.

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Today:

A dry, bright and very cold start for most places. Snow showers pushing into parts of south Devon, Cornwall and the Isles of Scilly, with accumulations possible, The odd snow flurry possible elsewhere. Feeling bitterly cold in strengthening easterly winds. Maximum temperature 2 °C.

Tonight:

A very cold night with strong winds and increasing amounts of cloud. Staying largely dry but a few snow flurries possible. Minimum temperature -6 °C.

Thursday:

Storm Emma bringing severe gales for many parts and some persistent snow on Thursday. This could give blizzard conditions in the afternoon and a risk of freezing rain. Bitterly cold. Maximum temperature 2 °C.

Outlook for Friday to Sunday:

Staying windy on Friday with icy stretches possible and a risk of further snow or freezing rain for some. Less cold into the weekend with lighter winds and some rain.